Redshift evolution of the MIR effective radius in three different stellar mass ranges. Circles are color-coded by their MIR-to-optical size ratio. The black diamonds are the sliding median for the MIR sizes. The median error bar is shown in black in the upper middle panel. The green lines show the best fitting results using Eq. (5) and the shaded green regions are the corresponding scatter. Finally, the black triangles are the sliding median for the optical sizes of the same galaxies, while the blue lines show the best-fitting results for these sizes using Eq. (5).